Automatic clip for tentering machines



July 18, 1950 J. DUNGLER AUTOMATIC CLIP FOR TENTERING MACHINES Filed Feb. 12, 1948 Fig IN vE/V TOE JUL/4 Pu/V 1 1? WW Patented July 18, 1950 AUTOMATIC CLIP FOR TENTERING MACHINES Julien Dungler, Basel, Switzerland Application February 12, 1948, Serial No; "1,941 In France February 14, 1947 structure with pins for tentering machines which clip structure is absolutely reliable in operation. ,To'this end, such clip according to the invention comprises, in combination: a stationary jaw adapted to receive the selvedge of the cloth; a movable jaw provided with atleast one row of needlesor pins; cavities or perforations provided Inthe stationary jaw so as to register with the pins of the movable jaw; and at least one element which is secured to the movable pin-supporting jaw and intended to prevent the clip from closing completely so long as said element is resting against the cloth.

In order to prevent the cloth from being able to come accidentally in contact with the pins before the clip is completely closed and thereby damaging said cloth, the automatic pins clip according to the invention may advantageously be provided with a protecting plate inserted between the movable jaw and the stationary jaw, said plate being provided with openings which allow the pins to pass through it at the instant when the pinsupporting jaw closes on the selvedge when the same has reached the correct position.

An embodiment of such a clip structure is described hereinafter and diagrammatically illustrated (merely by way of a non-limitative example) in the accompanying drawing in which:

Fig. 1 is a side view, partly in vertical section, of the automatic pins clip according to the invention, the cloth being positioned inside the clip in which said cloth still prevents the closing of the movable jaw;

Fig. 2 is a view similar to Fig. 1, but showing the movable jaw completely closed and consequently with the pins engaged in the selvedge which has been moved into the correct position;

Fig. 3 is a plan view of the clip; and

Fig. 4 is a plan view of the stationary jaw.

In these figures, I is the stationary jaw of the clip, 2 is the movable jaw thereof mounted for pivotal movement about the spindle 3 which is supported by bearings 4 on to the stationary jaw I. The movable jaw 2 is provided with a projection on which is mounted a roller 5 which is adapted to co-operate with a stationary ramp producing the opening of the clip at the opportune instant, as is well known for the usual automatic clips.

The movable jaw 2 is provided, at the edge of its face located opposite the stationary jaw I, with one or more rows (two in the example shown) of needles, or pins, 6 which are adapted to penetrate the selvedge of the cloth I when said cloth is 4 Claims. (eras-62) moved into the correct position (Fig. 2), the stationary jaw I being provided with cavities, perforations or recesses 8 which thus receive the points of the pins 6.

Said movable jaw 2 is furthermore provided with one or more members (rollers, fins, ribs or equivalent means), in the case illustrated two fins 9 of the type known in ordinary automatic clips, andthe purpose of which is to prevent the movable jaw from completely closing so long as said members are resting against the cloth I (Fig. 1). When, as the tenter chains gradually move away from one another, the cloth I slides under the fins 9 until it uncovers cavities or openings I0 provided in the stationary jaw I, said fins 9 engage in said cavities or openings I0, thereby enabling the movable jaw 2 to close completely and the selvedge of the cloth I to be engaged by the pins 6 (Fig. 2).

In this embodiment, the shape and the mounting of the movable jaw 2 are such that its inner face which supports the pins 6 is adapted, when said jaw completely closes (Fig. 2), to place the pins 6 at right angles to the face of the stationary jaw I on which the cloth I rests.

In order to eliminate all risks of damaging the cloth owing to its coming accidentally into contact with the pins 6 before the closing of the jaw 2, a protective member or plate I I secured to the stationary jaw I is arranged at a certain height above the same in such a manner that, when the jaw 2 has not yet completely closed (Fig. 1), the points of the pins do not project below the recesses or openings I2 provided in said plate for them to pass through when the jaw 2 completely closes in which position it abuts against the surface of said plate (Fig. 2). Furthermore, the protecting plate II is provided with openings I3 for the guide fins or elements 9 to pass through.

The mounting of such automatic clips on the chains may be effected in any suitable manner. In the embodiment illustrated, the clip is in fact extended rearwardly by arms I4 connected to one another by a cross member I5 to which is fixed, by means of screws I6, an extension ll" of the upper outer cheek I! of a link of a translatory roller chain I9, the upper inner cheek of which is designated by I1, the lower inner cheek by I8 and the lower outer cheek by I8. On the spindles of each of the rollers I1 is mounted a ball-bearing 20 forming a guiding and supporting means, the V-shaped periphery of which slides as its rolls along a track 2| provided in the rail 22.

It is of course understood that the invention is in no way limited to a particular embodiment and that modifications, improvements of details and uses of equivalent means may be devised, Without thereby exceeding the scope of said invention. c

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:

1. An automatic clip for the 'selvedge of cloth in tentering machines comprising a lower jaw forengagement with said selvedge of the cloth, an

upper jaw including at least one row of pins andl.

arranged to move to closed positionof said clip and relatively to said lower jaw, said lower jaw" being provided with a row of perforations for registry with said pins in said closed position, at least one guide element extending .from said upper jaw toward said lower jaw and adapted .to

prevent said clip to assume its closing position so 3. An automatic clip according to claim 2, I

. dist stationary jaw.

4 wherein said upper jaw abuts against said plate when said pins pass through said respective openings of said plate.

-4. In an automatic clip having jaws movable relatively to each other, stationary jaw and mov- -able jaw, respectively, and further having pins carried by said movable jaw for engagement with the selvedge of cloth in tentering machines; a protective --plate arrangedto extend intermediate both said jaws and spaced a predtermined w from said stationary jaw, said plate being provided with openings permitting the pins "to pass therethrough at the instant when said pin-supporting movable jaw closes on the selvedge in-predetermined position of the selvedge on said J ULIEN DUNGLER.

REFERENCES CITED The following references are of record in the file of this :patent': l

UNITED STATES PATENTS .Date

N b am $396,441, Whitley June 27., 19 11 PATENTS Y 1 Number Country 7 Data M g 15,612 lGreat'Britain Ju1y*14,-1',903

'.Great Britain Dec. 31,1907 

